Doble M4000 Calculator
Enter your Doble M4100 Test report reading below
( This formula is valid only for Test kV=10 )
If NaN or infinity message shows up, ignore it. Continue entering your data.
test data in Watts
test data in mA
= Measured PF in (%)
Capacitance (pF) =
Sample measured test data for hands on practice
| Test # | Energize | GND | GAR | UST | mA | Watts | % PF | Measure |
1 |
H |
L |
24.78 | 0.596 | 0.24 | CH + CHL | ||
2 |
H |
L |
9.077 | 0.191 | 0.21 | CH | ||
3 |
H |
L |
15.700 | 0.396 | 0.25 | CHL (UST) | ||
1 - 2 |
15.703 | 0.395 | 0.25 | CHL | ||||
5 |
L |
H |
40.160 | 1.097 | 0.27 | CL + CHL | ||
6 |
L |
H |
24.920 | 1.097 | 0.44 | CL | ||
7 |
L |
H |
15.700 | 0.396 | 0.25 | CHL (UST) | ||
5 - 6 |
15.690 | 0.404 | 0.26 | CHL |
Credit: Doble Engineering
Formula Recall: (%)PF = (test data in watts x 10) / test data in mA
Formula Recall: Capacitance (in picoFarad) = test data in mA x 265